The fate of endogenous gibberellins and applied radioactive gibberellin A_3 during natural and ethylene-induced senescence in citrus peel

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概要

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• The fate of gibberellins (GAs) was studied in the flavedo (the external colored peel layer) of green-harvested orange fruits, during natural and ethylene-induced senescence. GA-like substances were determined by the sugar-release barley endosperm bioassay. Careful solvent partition and TLC separation were undertaken to avoid interference of abscisic acid (ABA) and other growth inhibitors with the bioassay. Three zones of GA-like activity were detected in chromatograms of the acid fraction, all of which decreased sharply after 72 hr in 35 μl/liter ethylene. Tritium-labeled gibberellin A_3 (3^H-GA_3) was applied to fruits at 5.6 mg/liter. After 5 days storage in air or ethylene, 28.5 and 20.2 percent, respectively, of extractable radioactivity were recovered as 3^H-GA_3, whereas 37.0 and 59.7 percent, respectively, had been converted into water-soluble compounds. The significance of GA metabolism in senescent plant organs is discussed.

• 日本植物生理学会の論文

著者

• Goldschmidt Eliezer

  Department Of Horticulture Faculty Of Agriculture The Hebrew University Ofjerusalem

• Goldschmidt Eliezer

  Department Of Citriculture Hebrew University

• Galily David

  Department of Horticulture, Faculty of Agriculture, The Hebrew University ofJerusalem

• Galily David

  Department Of Horticulture Faculty Of Agriculture The Hebrew University Ofjerusalem

関連論文

• A requirement for protein synthesis during the curvature of citrus petals
• The fate of endogenous gibberellins and applied radioactive gibberellin A_3 during natural and ethylene-induced senescence in citrus peel
• A requirement for cytoplasmic protein synthesis during chloroplast senescence in the aquatic plant Anacharis canadensis

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